atomic number 14 vs feldspar

atomic number 14 and feldspar both are nouns.

Word	Noun	Adjective	Verb	Adverb
atomic number 14	Yes	No	No	No
feldspar	Yes	No	No	No

atomic number 14 (noun)	feldspar (noun)
a tetravalent nonmetallic element; next to oxygen it is the most abundant element in the earth's crust; occurs in clay and feldspar and granite and quartz and sand; used as a semiconductor in transistors	any of a group of hard crystalline minerals that consist of aluminum silicates of potassium or sodium or calcium or barium